I am writing an extension to (or subclassing, or whatever) MathML::Entities - MathML::Entities::Approximate. I would like my package four things:

  1. Perform a lookup on a data hash defined within itself
  2. Pass on any function/method calls not defined in MathML::Entities::Approximate up to MathML::Entities (preferably without having to do:
    sub name2numbered {return MathML::Entities::name2numbered(@_)}
  3. Load MathML::Entities for the user, even though they only ask for MathML::Entities::Approximate
  4. Extend the %ENTITIES hash in MathML::Entities [defined with my %ENTITIES = (.....) ]

MathML::Entities exports two funtions automatically, and I want to be available even though only use MathML::Entities::Approximate; has been called.

  1. This is easy - done that.
  2. I read that this should just be a case of a use base MathML::Entities... but it's not happening. I've also tried use MathML::Entities; our @ISA = qw(Exporter MathML::Entities); - to no avail: the exported function from MathML::Entities is not available
  3. This is causing me problems. %ENTITIES is defined as a my variable in MathML::Entities - so how to I access it and add to it such that MathML::Entities functions can access the new data.

Any pointers/tips/advice/hand-holding/etc...?



-- Ian Stuart
A man depriving some poor village, somewhere, of a first-class idiot.

In reply to Modifying/extending a superclass' data by kiz

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